/*
* @(#)Areas.java 1.24 99/09/07
*
* Copyright (c) 1998, 1999 by Sun Microsystems, Inc. All Rights Reserved.
*
* Sun grants you ("Licensee") a non-exclusive, royalty free, license to use,
* modify and redistribute this software in source and binary code form,
* provided that i) this copyright notice and license appear on all copies of
* the software; and ii) Licensee does not utilize the software in a manner
* which is disparaging to Sun.
*
* This software is provided "AS IS," without a warranty of any kind. ALL
* EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING ANY
* IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR
* NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN AND ITS LICENSORS SHALL NOT BE
* LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING
* OR DISTRIBUTING THE SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR ITS
* LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR DIRECT,
* INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER
* CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY, ARISING OUT OF THE USE OF
* OR INABILITY TO USE SOFTWARE, EVEN IF SUN HAS BEEN ADVISED OF THE
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*
* This software is not designed or intended for use in on-line control of
* aircraft, air traffic, aircraft navigation or aircraft communications; or in
* the design, construction, operation or maintenance of any nuclear
* facility. Licensee represents and warrants that it will not use or
* redistribute the Software for such purposes.
*/
package demos.Clipping;
import java.awt.*;
import java.awt.event.*;
import java.awt.geom.Area;
import java.awt.geom.Ellipse2D;
import java.awt.geom.GeneralPath;
import javax.swing.*;
import ControlsSurface;
import CustomControls;
/**
* The Areas class demonstrates the CAG (Constructive Area Geometry)
* operations: Add(union), Subtract, Intersect, and ExclusiveOR.
*/
public class Areas extends ControlsSurface {
protected String areaType = "nop";
public Areas() {
setBackground(Color.white);
setControls(new Component[] { new DemoControls(this) });
}
public void render(int w, int h, Graphics2D g2) {
GeneralPath p1 = new GeneralPath();
p1.moveTo( w * .25f, 0.0f);
p1.lineTo( w * .75f, h * .5f);
p1.lineTo( w * .25f, (float) h);
p1.lineTo( 0.0f, h * .5f);
p1.closePath();
GeneralPath p2 = new GeneralPath();
p2.moveTo( w * .75f, 0.0f);
p2.lineTo( (float) w, h * .5f);
p2.lineTo( w * .75f, (float) h);
p2.lineTo( w * .25f, h * .5f);
p2.closePath();
Area area = new Area(p1);
g2.setColor(Color.yellow);
if (areaType.equals("nop")) {
g2.fill(p1);
g2.fill(p2);
g2.setColor(Color.red);
g2.draw(p1);
g2.draw(p2);
return;
} else if (areaType.equals("add")) {
area.add(new Area(p2));
} else if (areaType.equals("sub")) {
area.subtract(new Area(p2));
} else if (areaType.equals("xor")) {
area.exclusiveOr(new Area(p2));
} else if (areaType.equals("int")) {
area.intersect(new Area(p2));
} else if (areaType.equals("pear")) {
double sx = w/100;
double sy = h/140;
g2.scale(sx, sy);
double x = w/sx/2;
double y = h/sy/2;
// Creates the first leaf by filling the intersection of two Area
// objects created from an ellipse.
Ellipse2D leaf = new Ellipse2D.Double(x-16, y-29, 15.0, 15.0);
Area leaf1 = new Area(leaf);
leaf.setFrame(x-14, y-47, 30.0, 30.0);
Area leaf2 = new Area(leaf);
leaf1.intersect(leaf2);
g2.setColor(Color.green);
g2.fill(leaf1);
// Creates the second leaf.
leaf.setFrame(x+1, y-29, 15.0, 15.0);
leaf1 = new Area(leaf);
leaf2.intersect(leaf1);
g2.fill(leaf2);
// Creates the stem by filling the Area resulting from the
// subtraction of two Area objects created from an ellipse.
Ellipse2D stem = new Ellipse2D.Double(x, y-42, 40.0, 40.0);
Area st1 = new Area(stem);
stem.setFrame(x+3, y-47, 50.0, 50.0);
st1.subtract(new Area(stem));
g2.setColor(Color.black);
g2.fill(st1);
// Creates the pear itself by filling the Area resulting from the
// union of two Area objects created by two different ellipses.
Ellipse2D circle = new Ellipse2D.Double(x-25, y, 50.0, 50.0);
Ellipse2D oval = new Ellipse2D.Double(x-19, y-20, 40.0, 70.0);
Area circ = new Area(circle);
circ.add(new Area(oval));
g2.setColor(Color.yellow);
g2.fill(circ);
return;
}
g2.fill(area);
g2.setColor(Color.red);
g2.draw(area);
}
public static void main(String argv[]) {
createDemoFrame(new Areas());
}
static class DemoControls extends CustomControls implements ActionListener {
Areas demo;
JToolBar toolbar;
JComboBox combo;
public DemoControls(Areas demo) {
super(demo.name);
this.demo = demo;
setBackground(Color.gray);
add(toolbar = new JToolBar());
toolbar.setFloatable(false);
addTool("nop", "no area operation", true);
addTool("add", "add", false);
addTool("sub", "subtract", false);
addTool("xor", "exclusiveOr", false);
addTool("int", "intersection", false);
addTool("pear", "pear", false);
}
public void addTool(String str, String tooltip, boolean state) {
JButton b = (JButton) toolbar.add(new JButton(str));
b.setBackground(state ? Color.green : Color.lightGray);
b.setToolTipText(tooltip);
b.setSelected(state);
b.addActionListener(this);
}
public void actionPerformed(ActionEvent e) {
for (int i = 0; i < toolbar.getComponentCount(); i++) {
JButton b = (JButton) toolbar.getComponentAtIndex(i);
b.setBackground(Color.lightGray);
}
JButton b = (JButton) e.getSource();
b.setBackground(Color.green);
demo.areaType = b.getText();
demo.repaint();
}
public Dimension getPreferredSize() {
return new Dimension(200,37);
}
public void run() {
try { thread.sleep(1111); } catch (Exception e) { return; }
Thread me = Thread.currentThread();
while (thread == me) {
for (int i = 0; i < toolbar.getComponentCount(); i++) {
((JButton) toolbar.getComponentAtIndex(i)).doClick();
try {
thread.sleep(4444);
} catch (InterruptedException e) { return; }
}
}
thread = null;
}
} // End DemoControls
} // End Areas
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